body { 
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    letter-spacing: -0.025em;
}

/* Professional Background Patterns */
.hero-bg {
    background: 
        radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(99, 102, 241, 0.12) 100%);
    position: relative;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20px 20px, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
    z-index: -1;
}

.dark .hero-bg {
    background: 
        radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
}

.dark .hero-bg::before {
    background-image: 
        radial-gradient(circle at 20px 20px, rgba(59, 130, 246, 0.15) 1px, transparent 1px);
}

/* Professional Section Backgrounds */
.section-pattern {
    position: relative;
}

.section-pattern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(45deg, transparent 65%, rgba(59, 130, 246, 0.03) 75%, rgba(59, 130, 246, 0.03) 85%, transparent 95%);
    background-size: 60px 60px;
    z-index: -1;
}

.dark .section-pattern::before {
    background-image: 
        linear-gradient(45deg, transparent 65%, rgba(59, 130, 246, 0.08) 75%, rgba(59, 130, 246, 0.08) 85%, transparent 95%);
}

#three-container {
    position: absolute;
    top: 0;
    left: 0;
    z-index: -2;
}

/* Professional Navigation Blur */
.nav-blur {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.dark .nav-blur {
    background: rgba(15, 23, 42, 0.85);
    border-bottom: 1px solid rgba(59, 130, 246, 0.2);
}

/* Professional Card Shadows */
.card-professional {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(59, 130, 246, 0.1);
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06),
        0 0 0 1px rgba(59, 130, 246, 0.05);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-professional:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04),
        0 0 0 1px rgba(59, 130, 246, 0.1);
}

.dark .card-professional {
    background: rgba(30, 41, 59, 0.95);
    border: 1px solid rgba(59, 130, 246, 0.2);
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.3),
        0 2px 4px -1px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(59, 130, 246, 0.1);
}

.dark .card-professional:hover {
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.4),
        0 10px 10px -5px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(59, 130, 246, 0.2);
}

/* Professional Buttons */
.btn-professional {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    box-shadow: 0 4px 15px 0 rgba(59, 130, 246, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-professional::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s;
}

.btn-professional:hover::before {
    left: 100%;
}

.btn-professional:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(59, 130, 246, 0.4);
}

.btn-outline-professional {
    position: relative;
    background: transparent;
    border: 2px solid #3b82f6;
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-outline-professional:hover {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(59, 130, 246, 0.3);
}

/* Typography Enhancements */
.heading-primary {
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1.1;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dark .heading-primary {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.heading-secondary {
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.text-professional {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #64748b;
}

.dark .text-professional {
    color: #94a3b8;
}

/* Smooth Animations */
.animate-fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Navigation Link Hover Effects */
.nav-link {
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}